Claus swanberg



(No Model.)

G. SWANBERG.

LOOK.

PatentedOct. 30, 1894.

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NITED STATES ATENT- Prion.

CLAUS SWANBERG, OF GILBERT, MICHIGAN.

LOCK.

SPECIFICATION forming part of Letters Patent No. 528,450, dated October30, 1894.

Application filed August 3, 1894. Serial No. 519,365. (No model.)

To all whom it may concern.-

Be it known that I, OLAUs SWANBERG, a citizen of the United States,residing at Gilbert, in the county of We'xford and State of Michigan,have invented certain new and useful Improvements in Locks; and I dodeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to letters of reference marked thereon,whichform a part of this specification.

Figure 1 of the drawings is a representation of a side elevation ofinvention with cap removed showing bolt shot. Fig. 2 is same with boltdrawn and its rack teeth pushed into engagement with pinion. Fig. 3 issame with rack teeth of bolt out of engagement with pinion. Fig.4 isaplan View of removable cap plate. Fig. 5 is a perspective view of bolt.

This invention has relation to certain new and useful improvements incombined locks and latches, the object being to provide an improveddevice of this character consisting of but few parts, simple buteffective in action, and having its look so arranged that it I,

may be readily operated from the inside at all times without the aid ofa key, but which cannot be worked from the outside without a key.

With this object in .view, the invention consists in the novelconstruction and combination of parts, all as hereinafter described andpointed out in the appended claims.

Referring to the accompanying drawings, the letter A designates the caseof the lock, having a removable cap plate A.

B is the knob spindle which extends through the case, inside of which itcarries a hub or boss 0 to which is keyed or otherwise rigidly secured amutilated pinion D, whose toothed portions to are opposite to eachother.

E designates the latch bolt which is arranged to slide in a guide way inthe upper portion of the casing and which has formed thereon a rack 12which is designed to be always in mesh with the pinion D and istherefore actuated whenever the knob spindle is turned. E is a coiledspring which acts against the inner end of said bolt to normallyprotract it. v

F designates the lock bolt, which is arranged to slide in a guideway inthe lower portion of the case, and which is capable of an up-and-downplay in said guideway. The inner end of said bolt is reduced in width,and has on its upper edge a rack 61 whose teeth are normally out ofengagement with the teeth of the pinion, the bar being held away fromthe pinion by means of a spring Gbearing against its inner portion. Inits normal position, therefore, the operation of the knob spindle has noeffect upon the bolt lock.

H designates a push bar which slides in a guide in the casing at rightangles to the lock and latch bars, and underneath the inner end portionsthereof, such end portions being cut away on the under side, asindicated at h, to

accommodate said bar. The upper end portion of said bar projects throughan opening in the casing, and terminatesin a button h.

The lower end portion of the bar is pivoted to an arm K, which rocks ona horizontal pivot is, and which is situated just below the innerreduced portion of the lock bolt and in contact therewith. On the saidarm is a tooth or projection g, which is adapted to engage either one oftwo recesses k k, on the under side of said bolt.

It will be apparent from the above description, that when the button his pressed, the arm K is rocked, bringing its free end portion to bearpositively against the lock-bolt, and forcing the rack teeth of thelatter into engagament with the teeth of the pinion, so that if the knobspindle be turned, said bolt will be actuated. As the arm K is rocked,its tooth or projection 70 is moved out of engagement with the recess 70is, it being in engagement with the former when the bolt is protracted,and with the latter when it is withdrawn. As soon as'the button hisreleased, the spring G throws the lock bolt down out of engagement withthe pinion. be observed, therefore, that the lock may be readilyoperated from the inside, but it cannot be operated from the outsideexcept by means of a suitable key P, whose bit is arranged to engage adepression 19 in the push It will 5 a similar shoulder m of the case.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In a lock, the combination with a knob spindle, a pinion fasttherewith, a sliding latch bolt having a rack thereon in constantengagement with said pinion, a lock bolt at the opposite side of saidpinion, having a rack normally out of engagement with said pinion, apush device arranged to be operated from one side of the door to throwsaid lock bolt into engagement with said pinion, and a key arranged toact upon said push device from the opposite side of the door,substantially as specified.

2. In a lock, the combination of a knob spindle, a pinion fast thereto,a latch bolt having a rack thereon in constant engagement with saidpinion, a lock bolt upon the opposite side of the pinion and having arack thereon normally out of engagement with said pinion, a push barhaving a projecting button at one end, a rocking arm to which theopposite end portion of said push bar is loosely connected, said armbeing in contact with said latch bolt, a tooth or projection on saidrocking arm adapted to engage recesses on the lock bolt, and a springbearing upon said lock bolt and normally holding it out of engagementwith said pinion, substantially as specified.

In testimony whereof I aflix my signature in presence of two witnesses.

CLAUS SWANBERG.

Witnesses:

E. E. HASKINS,

BEN OLSEN.

